Hydraulic amplifier valve assembly
US4697497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Dec 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic amplifier valve assembly having an input end (where, for example, a brake pedal force may be applied) and an ouput end includes a valve housing and an amplifier piston which is slidably received in the housing only along that end portion which is oriented towards the input end. The other terminal length portion of the amplifier piston which is oriented towards the ouput end continuously projects from the valve housing and carries a pressure conduit nipple and a return conduit nipple. The valve housing is a sheet metal construction formed of a plurality of interconnected elements. This housing includes an outer, rotationally symmetrical, generally cup-shaped sheet metal housing shell and a sheet metal inner cylinder sleeve which extends inside the housing shell coaxially therewith and at a radial distance therefrom, approximately over the entire length of the housing shell. The input-side end of the cylinder sleeve is connected to the housing shell in such a manner that an annular space, which is hermetically sealed towards the input end, is defined between the housing shell and the cylinder sleeve. The amplifier piston has a tubular portion which is open towards the inp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.